Incandescent lamp.



.7 T- I. SHONLEY.

mcmpsscznr um; APPLICATION FILED 026.15. 1914.

1,197,555. PatentedSepp. 5, 1916."

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" a ine ra ninon THEODORE Zl'. SHONLEY, 0E LEAVEN'WORTE, KANSAS.

Incennnscnnr LAMP.

menses.

Epeciflcation of ie'jtters Patenti Patented s t. 5, rain Applicationfiled December 15, 1914. Serial Ito. 877,381.

' may be used for matching colors, where the ordinary electric lightcannot so be used. I In the drawings accompanying this specification andforming a part thereof, the preferable form of my invention is illutratedQin which Figure 1 is a view in perspectiveof my novel lainp. Fig.2 is asectional View taken on the line 2-2 of Fig. l.

Referring to the drawings in which simi lar reference numerals designatecorrespondi ing parts throughout the several views, the lamp includesthe usual base 3 and exhausted bulb 4i,

The tube 5 which carries the lead-in wires 6 and 7 is supported by thebase 3 into which the upper supporting arms 8 are atlixed.

The insulated post or standard 9 is carried by the tube..;5*and supportsthe lowerfilai cut. carrying arms' -10. The filament carrying arms 8 and10 are insulated one from the other and include the hooked terminal ends11 around which the filament extends as is the usual and approvedconstruction.

The filament 12 which is supported by the arms'8 and 10 is formed of aplurality of discontinuous sections l314-15, three being illustrated inthe present drawings, but it will be readily understood that this numbermay be varied if desired.

The filament section 13-is-in electrical connection with the lead-in 6and has its opposite discontinuous end 16 rigidly affixed and -heldstationary by one of the upper filament supporting arms 8. The adjacent,filament section 1% is provided witl ffthe free bendable end 17 restingupon the stationary end 16 thereof with Which'it eifectsa slidingelectrical connection. Thus the length of the active portions of thefilaments 14 will depend upon the position of the free end 17 and thedistance or length thereof which overlaps the stationary end 16 of theadjacent filament. The free end 17 is provided with the spaced stops 18arranged upon opposite sides of the point of contact between thefilament sections and limit the relative sliding motion therebetween.The remote free end 19 of the filament section-14 is similarly arrangedand efiects a sliding elec- I trio connection with the filament section15, which latter is in electric connection with the lead-in wire 7.

An incandescent lamp constructed as described provides an efiicientmeansfor matching colors owing to its peculiar whiteness.

Having thus fully described my invention what l1 claim is Anincandescent lamp having sectional filaments, including two endfilaments and a central filament having projecting ends engagingandextending beyond the end filaments.

THEODORE J. snoNLnY.

Witnesses:

Jnssn A. HALL, H. V, REILLY.

